Venture capitalists should display some responsibility just like big corporations do. Just as companies like Facebook this year have begun to grapple with their corporate responsibility, Silicon Valley investors this week began to confront what could be called their geopolitical responsibility. The proximate cause: The alleged murder of Saudi dissident and journalist Jamal Khashoggi on orders from Saudi Arabia leaders, in an event that could put an end to the budding love affair between the Saudi money machine and the Silicon Valley titans who welcomed it with open arms just six months ago.